Peters



2 Sheets-Sheet 1.

w. E. GILL 8; R. SEGERDAHLJ ELECTRICAL NEEDLE ANNUNGIATOR. 1 No. 383,725. Patented May 29, 1888.

(No Model.)

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2 W. E. GILL 85 R. SEGERDAHL,

ELEETEIEAL' NEEDLE ANNUNGIATOR.

No. 383,725. Patented May 29, 1888 Mr/755535, v 7/7 UTE/7 2 ET mfi u g wma m, E

W M EZ N. PETERS. Pholwlitbographcr. Washln lmn, D C.

' UNITED STATES PATENT OFFICE.

WILLIAM E. GILL AND RUDOLPH SEGERDAHL, OF CHICAGO, ILLINOIS, ASSIGNORS TO JOHN F. WOLLENSAK, OF SAME PLACE.

ELECTRICAL NEEDLE ANNUNCIATOR.

sPBcIPIcA'r'IoN forming part of Letters Patent No. 383,725, dated May 29, 1888.

Application filed November 14. 1885. Serial No. 182,782. (No model.)

To aZZ whom it may concern.-

Be it known that we, WILLIAM E. GILL, a citizen of the United States, and RUDOLPH SEGERDAHL, a subject of the King of Sweden, both residing at Chicago, Illinois, have invented certain new and useful Improvements in Electrical Needle Annunciators, of which the following is a specification.

The object of our invention is to make a movement for electrical needle annunciators (and it is to needle annunciators that our invention specially relates) in which all of the parts maybe assembled or put together on the bench and kept in stockready for use as the same may be required, and ourinvention con sists in the features and details of construction hereinafter described and claimed.

In the drawings, Figure l is a perspective view of an annunciator-case with four annunorator-movements in place, the case being open to exhibit them. Fig. 2 is a perspective view of the front portion of the faceplate of the annunciator-case,showing one annunciator-movement attached thereto. Fig. 3 shows the frame which we cast for assembling the parts of the annunciator-Inovement thereon. Fig. 4 is a detail view of the armature of the annunciatormovement. Fig. 5 is a detail view of thelifting-bar or restoring mechanism by which the needles are brought back to their normal po' sitions; and Fig. 6 is a front elevation of the annunciatoncase, the battery, and the call-buttons, showing the arrangement and connection of the wires with the corresponding nccdlesin the an nunciator-case.

In the drawings, A is the annunciator-case; B, the faceplate of the annunciator case.

0 is the bell.

D is the asscmblingframe of the annunciator-movements.

E is the armature.

F is the weighted lever, which turns the shaft to which the needle is attached when the armature is raised to release the same.

G is the needle.

H is the hooked end of the weighted lever where it engages with the armature.

I is the electro-magnet by which the armature is raised and the needle permitted to turn when the electric current passes from the bat tery through the circuit,

J is a screw to adjust the fall of the armature.

K is the restoringbar; L, slots in the same; M, the end of the assembling-frame, by which it is attached to the face-plate of the annunciator-case; N, springs that lie against the con-- nectingscrews l 2 3, &c., in the back of the annunciator-case, to which the wires from the call-buttons are attached, and by'which their connection with the annunciatonmovements is effected.

O is the battery.

P P are the call-buttons.

Q are Wires.

R are cars or projections on the assemblingframe, to which the electro-magnets are attached. I

S is a downwardly'projecting branch of the assembling-frame, to support the front end of the needle-shaft.

T is another downwardly-projecting branch of the assembling-frame, in which the rear end of the needle-shaft is'supported.

U are lugs on the downwardly-projecting piece T, between which the pivoted end of the armature is placed.

V in Fig. 2 are the screws by which such pivoting is accomplished.

W is a screw on the assembling-frame, to which one end of the wire of the electro-magnet is attached.

X is the hole in the assembling-frame for such connectingscrew.

Y is a screw in the back frame of the annunciator-case, forming the terminal of one end'of the wire from the battery; and Z, another receivingscrew.

In making our invention we cast a frame on which the various parts of the annunciatormovement are to be assembled. This frame is preferably castin one piece and in the shape shown in Figs. 2 and 3 of the drawings. At one end, M, holes are provided for screwing or otherwise properly attaching the frame of the annunciator-movement to the face-plate of the annunciator-case. The attachment is shown in Figs. 1 and 2. A short distance from this attaching end of the assembling-frame ears or projections R are provided with holes, in which one end of the electro-magnet may be riveted or fastened to sustain the same in its proper position. These projections may extend out on. both sides of the assemblingframe, or at one side only, as may be desired, or may even be dispensed with where only one electro-magnet is used, as in such case it can be riveted in the body or main portion of The electro-magnet is shown in position in Figs. 1 and 2. Oneit'her.

the assembling-frame.

side of the electro-magnet we prefer to have branches depending from the main portion of z the assembling-frame, (designated by the letters S and T in Fig. 3,) for the purpose hereinafter T terminates in a single piece or end,the a'rmatn're will of course be pivoted on it, while where two are used it should be pivoted between them. The armature, when in its normal .position,lies a short distance below-the lower ends of the electro-magnets. On the needle'shaft a weighted lever, F, is attached. Thelowerend of this weighted lever terminates in a hook, H, "that engages with the free end of the armature when the armature is not affected or raised by'the electro-magnets, and which is-released whenever the armature is so raised. A screw, U, is ar ranged in the pivoted end of the armature to determine the extent to which it-can fall after being acted upon by the electromagnet, and when the hooked end of the weighted lever is not in place to receive it. The upper As soon Between theJugs-Or ears U on the branch 'I of the assembling-frame, where two ears or lugs are employed, the pivoted.

as the armatureceases to be acted upon by the electro-Inagnets its free end falls into its normal position, and by lifting the restoring-bar K the weighted lever is brought into position and its hooked end H into engagement with the armature.

The lifti'ng'orrestoring bar is'made with any desired number of slots-at proper intervals to permitthe several weighted ends of the weighted levers to be in them. They should of course bemade long for annu-nciator-cases which have alarge number of annunciator-movements in them, and short for those which have few. In

each case, however, the-operation is the same,

the weighted levers being raised to their normal position by the restoring-bar.

In operation whenever a call button is touched in electric circuit is made through the wire connecting with the battery. An elec tric current is generated and passed from the battery down the wire tothe terminalreceiverscrew Y. The current-then preferably passes upward through thebell,ringing the same,and down the wire (shown in dotted lines) to the receiver-screw Z, which rests against the righthand spring N in the annunciatorcase when the case is closed. The current passes from this spring to the metallic face-plate of the annunciator through the assembling-frame of the annunciator-movement corresponding to the call-button touched, thence through the wires coiled around the electro-magnets, thereby magnetizing the iron cores of the same, and thencebaok to the battery. While the iron cores of the electromagnets are magnetized the armature is thereby attracted and raised, the-hooked end of the weighted lever is released, the weighted end of such lever falls forward, and the needle is turned to indicate the position of the call-button touched.

What we claim as new, and desire to secure by Letters Patent, is-

In electrical needle annunciators, a slotted restoring-bar, in combination with weighted levers, the weigh ted ends of the weighted levers being in the slots, and'being restored thereby to their normal position, substantially as described.

WILLIAM E. GILL. RUDOLPH SEGERDAHL.

Witnesses:

E. F. HUBBARD, THOMAS A. BANNING. 

